Hi This is the follow-up that I promised yesterday on the male reproductive system- this will include the structure and the functions of the parts. THE STRUCTURE OF THE MALE REPRODUCTIVE SYSTEM The primary sex organ is the testes. It produces sperm and testosterone The 3 additional glands are: Seminal vesicles. They provide fructose which […]
Hi This post focuses on only the female reproductive system, the next post will probably be on the male reproductive system. STRUCTURE: OVARY Female gonad. Either of the female sexual glands in which oocytes are formed. UTERUS Hollow muscular organ in female mammals in which the blastocyte becomes embedded and the developing embryo and fetus […]
Hi Quick post about these two STDs- this will most probably just be a short question or a multiple-choice question CAUSES: Syphilis- spiral-shaped bacterium called treponema pallidum Gonorrhea- round bacteria called neisseria gonorrhoeae SYMPTOMS: Syphillis- small sores, skin rash, lip sores, pelvic lymph nodes are swollen Gonorrhea- pain during urination and thick greenish discharge as […]
Hi DEFINITIONS: Courtship: Behaviour that is designed to attract another animal for mating and breeding External fertilisation: Sperm is deposited outside the female’s body Internal fertilisation: Sperm is deposited inside the female’s body Ovipary: Strategy where animals lay eggs that often have many offspring e.g. frogs Ovovivipary: Like in snakes- a strategy where the animal […]
Hi DEFINITIONS Sexual reproduction: Involving the fusion of male and female gametes Asexual reproduction: Reproduction that does not involve gametes Haploid: An individual/cell having one member of each pair of homologous chromosomes. This is half of the amount found in somatic cells, typically in gametes in which union will restore the diploid number Diploid: Somatic […]
Hi DEFINITIONS: Population demographics: The stats of a population such as the size, the density, growth rate and age distribution Population pyramids: Bar graph that shows the composition by age & sex of a nation’s population at the time of a census. It is a convenient way of showing how the population is made up […]
HI You know the drill, first comes definitions: Ecological succession: Sequence of communities where one replaces another over time Primary succession: When plants and animals settle for the first time in an area where there was previously no life. Usually occurs where there was previously no soil Pioneer species: First plants/ species settling down in […]
Hi I am also doing this section all in one post. DEFINITIONS: Community: A group of populations occurring in a particular area, e.g.: lions, zebras and rhinos in a wildlife park Producers: All green plants that are able to synthesise and thus can produce their own organic food (carbs) Consumers: Organisms that cannot produce their […]
Hi This is one long post covering the whole section of population ecology. Starting with some definitions: Species: A group of organisms that can reproduce successfully to produce fertile offspring Habitat: The specific type of environment in which a plant or animal species normally occurs Population: A group of organisms of the same species that […]
Hi Negative feedback- STOP DOING WHAT YOU’RE DOING This is basically the mechanic of the body. It reduces the output of a system in order to re-establish or stabilise the internal equilibrium. There are several negative feedback in biological systems to regulate and maintain homeostasis. IT BRINGS THE BODY BACK TO HOMEOSTASIS When the body’s […]
Oh Gosh My Grades 